160A-74. Quorum.
(a) A majority of the actual membership of the council plus the mayor, excluding vacant seats, shall constitute a quorum. A member who has withdrawn from a meeting without being excused by majority vote of the remaining members present shall be counted as present for purposes of determining whether or not a quorum is present.
(b) Any member present by means of simultaneous communication in accordance with G.S. 166A-19.24 shall be counted as present for the purposes of whether a quorum is present only during the period while simultaneous communication is maintained for that member.